Dual-Linearly Polarized Magneto-Electric Dipole Antenna for In-Band Full-Duplex Applications

A dual-linearly polarized (DLP) magneto-electric (ME) dipole antenna is proposed for the in-band full-duplex (IBFD) application. It is formed by ME dipoles with a shared central part, giving a compact and symmetrical antenna structure. It has four isolated channels, two for dual-LP transmitting (TX) and the other two for dual-LP receiving (RX). Due to the symmetrical structure, it can provide similar radiation patterns for both the TX and RX ports. Good isolation between any two of all four ports is obtained over a wide frequency range by modifying the antenna structure without introducing any additional complex feeding structures. To validate the proposed antenna, a prototype was fabricated and measured. The measured isolation of any two of four ports is better than 20.9 dB over the wide operating frequency band from 1.90 to 2.75 GHz (36.6%). The measured realised gain in the broadside direction and the measured radiation pattern remain stable in the whole operating frequency band and are similar for the different ports.